#!/bin/sh

# Define ask_yn, which asks a yes or no question and outputs the result as 1 for Yes and 0 for No.
# Takes two arguments:
# $1: The question to be asked.
# $2: The default answer, either "y" or "n".

ask_yn() {
    question=$1
    default_answer=$2

    # Capitalize the default option correctly
    if [ "$default_answer" = "n" ] || [ "$default_answer" = "N" ]; then
        prompt="${question} (y/N): "
    else
        prompt="${question} (Y/n): "
    fi

    while true; do
        printf "%s" "$prompt"
        STTY_CONFIG=$(stty -g)	# Save current stty config
        stty raw -echo		# Disable echo
        ANSWER=$(head -c 1)		# Scrape terminal input
        stty $STTY_CONFIG		# Restore stty config

        case $ANSWER in
            [Yy] ) echo "Y"; exit 1;;   # Yes: exit with 1
            [Nn] ) echo "N"; exit 0;;   # No: exit with 0
            "" ) if [ "$default_answer" = "n" ] || [ "$default_answer" = "N" ]; then echo "N"; exit 0; else echo "Y"; exit 1; fi;;   # Default: exit with the default value
            * ) printf "\nPlease answer Yes or No.\n";;
        esac
    done
}

ask_yn "$@"